There are many types of waste gas treatment equipment, different methods and principles:
1, dilution and diffusion method
Principle: the odor gas through the chimney to the atmosphere, or with odorless air dilution, reduce the concentration of malodorous substances in order to reduce the odor.
Scope of application: It is suitable for treating the malodorous gases in the middle and low concentration of the organized emission.
Advantages: low cost, simple equipment.
Disadvantages: vulnerable to meteorological conditions, malodorous substances still exist.
2, water absorption method
Principle: the use of odor in certain substances soluble in water, so that the odor components directly contact with water, so that dissolved in water to achieve the purpose of deodorization.
Scope of application: water-soluble, organized emission sources of malodorous gases.
Advantages: simple process, convenient management, low cost of equipment operation.
Disadvantages: low purification efficiency, should be used in conjunction with other technologies, mercaptans, fatty acids, etc., the treatment effect is poor.
3, aeration deodorization method
Principle: the malodorous substances in the form of aeration dispersed into the mixture containing activated sludge, through the suspended growth of micro-organisms degradation of malodorous substances applicable to a wide range.
Scope of application: As of 2013, it has been used in Japan for odor treatment at manure treatment sites and sewage treatment plants.
Advantages: After domestication, activated sludge can remove more than 99.5% of malodorous components that do not exceed the limit load amount.
Disadvantages: limited by the aeration intensity, the application of the method has some limitations.
4, catalytic oxidation process
Principle: reaction tower filled with special solid filler, filler inside the compound with multi-media catalyst. When the malodorous gas under the action of the induced draft fan through the packing layer, and through the special nozzle was dispersed mist sprayed liquid-phase compound oxidant in the solid-phase packing surface full contact, and in the multi-media catalyst catalytic effect, the malodorous gas in the pollutant factor is fully decomposed.
Scope of application: wide range of application, especially suitable for the treatment of atmospheric volume, medium and high concentration of exhaust gas, hydrophobic pollutants have a good removal rate.
Advantages: small footprint, low investment, low operating costs; easy to manage, ready to use.
Disadvantages: shock load resistance, not easy to pollutant concentration and temperature changes, need to consume a certain amount of chemicals.
Expanded knowledge: exhaust gas treatment equipment air volume calculation method is introduced
Since the environmental protection requirements are becoming more and more stringent, we all pay attention to environmental protection issues, the heat value of exhaust gas treatment equipment has been very high. In the purchase of waste gas treatment equipment or consulting waste gas treatment engineering related issues, have encountered the air volume problem, usually, people do not know how much air volume they should choose the equipment. Exhaust gas treatment equipment air volume calculation method is as follows:
1, on-site method:
When the measurement of exhaust emissions, that is: Q = Q × B/b/10000.
Meaning of the letters in the formula:
Q - the annual Q - exhaust emissions, unit "10,000 standard m3 / y"
q - exhaust hourly emissions, unit "standard m3 / h"
B --B - annual fuel consumption (or clinker production) in "kg/y"
b - hourly fuel consumption (or clinker production) under normal operating conditions in "kg/h". "kg/h"
2. Theoretical method:
The formula for calculating the air volume: air volume = plant volume (length*width*height) m3*constant (60~100)
The constant 60 or 100 in the above formula is an empirical value. If the operation time of the plant is very short, then the volume of exhaust gas is very small, then the constant can choose 60, if the operation time is short and the volume of exhaust gas is small, then the constant can choose 70 or 80, if the operation time is long and the volume of exhaust gas produced is large, then the constant can choose 90 or 100.